Abstract
Water hyacinth ( Eichhornia crassipes ),which was introduced as an ornamental plant about 1890,is the most serious aquatic weed in India (Gopal and Sharma 1981). Two species of weevils,viz., Neochetina eichhorniae Warner. and N. bruchi Hustache (Coleoptera: Curculionidae) of South Ameri can origin, have proved to be promising for the biological control of this weed under field conditions in Bangalore (Jayanth,1988 a,b). Consequently, there has been much demand for supply of these beneficial insects for releases in different parts of the country.
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